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0. H. BUNGARZ.

PROTECTING IRON FOR STAPLES.

No. 369,392. Patented Sept. 6 1887.

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CHARLES H. BUNGARZ, OF BROOKLYN, NEW YORK.

PROTECTING=IRQN FOR STAPLES.

SPECIFICATION forming part of Letters Patent No. 369,392, datedfieptember 6, 1887.

Application filed March .25, 1887.

To alZ whom it may concern: V

Be it known that 1, CHARLES H. Bnneiinz, a citizen ofthe United States,residing at Brooklyn, county of Kings, State of New York, have inventedcertain new and useful Improvements in Staples, of which the followingis a specification.

In the use of a certain class of staples which are subjected to heavystrains and considerable abrasion, such as whiflletree-staples, muchinconvenience is often incurred by the breaking of the loop or part ofthe staple at which all the wear occurs.

The object of my invention is to provide a simple and cheap means forprotecting the parts of staples subjected to abrasive strains; and itconsists of a detachable shieldpiece in the form of an arch havingperforated legs adapted to be placed over the limbs of the staple andits upper part formed to cover the inside of the loop. This part of theshield is made heavy and strong, so as to last a long time beforebecoming worn through by the ring or other device attached to thestaple. These detachable protecting shields when about worn through maybe quickly removed from the staples and replaced by new ones at anominal expense, the staples proper remaining intact, as they are fullyprotected by the shields thus lasting an indefinite time.

In the accompanying drawings, forming a part of this specification towhich I will now refer more fully to describe my invention, Figure 1represents a staple provided with my improved protecting-shield appliedto a whiifletree. Fig. 2 is a side elevation of the staple on anenlarged scale. Fig. 3 is a similar view showing the protecting-shieldin section; and Fig. at is a central section through the line a: m,Figs. 2 and 3.

The staple proper, a, is made in the ordinary manner with straight limbsa a, on the ends of which are fitted the nuts I) I). The detachableprotecting-shield c is made to conform to the inside of the staple a,the perforated legs c c fitting over and embracing the straight limbs aa of the staple, the ends of said legs resting against the whiffletree(l, or other device or place to which the staple is secured, and thepart 0 against which the loopof the staple a. bears, and which receivesall the wear strains, is rounding on the inner side, and is made strongand heavy, so that it will last a long time before it is worn throughSerial No. 232,421. (No model.)

by the abrasion of the ring 0 or other device attached to the staple.(Shown by dotted lines in Fig. i.)

The ends of the perforated legs of the shield constitute shoulders forthe staples,which, by being drawn firmly against the whiflietrce bymeans of the nuts I) b on the ends of the staple and acting against theopposite side of the whiil'flctree, make the whole very rigid andstrong, the staple proper being in no way weakened by the application ofmy shield thereto, but supported and braced thereby at all projectingparts subjected to strains.

Vhen it becomes necessary to replace an old worn shield by a new one,the nuts I) b of the staple a are removed, the staple drawn out, the oldshield slipped off, and a new one placed on the staple, which is thenset back and securely bolted in place by the nuts I) I).

In manufacturing these stapleshields it is preferable to cast them inone piece complete, so that they shall be in condition to be applied tothe staples as they leave the foundry,

and when they are made of iron malleable iron is preferable for thepurpose.

In the drawings I have shown my detach.

able protecting-shield applied to a whiflletree-staple. It is evidentthat these shields may be used with equal advantage on all staplessubjected to heavy abrasive strains.

Having now described my invention,wha't I claim, and desire to secure byLetters Patent, 1s

1. A detachable protecting-shield for staples, composed of a singlepiece of metal having perforated legs adapted to embrace the straightlimbs of the staple and constitute shoulders therefor when drawn firmlyagainst the wood by nuts on the bars of the staple, and a rounded heavypart arranged to fit in the loop of the staple, substantially as setforth.

2. The combination, with the staple a, having straight limbs a a andprovided with the nuts I) b, of the shield 0, having perforated legs 0c, with flat ends, and enlarged part 0, fit ting in the loop of thestaple, substantially as and for the purpose set forth.

In witness whereof I have hereunto set my hand, at New York, county andState of New York, this 23d day of March, 1887.

CHARLES H. BUNG-ARZ.

Witn esses:

H. D. WiLLIAMs, FLOY CLARKSON.

